I am guessing there are 2 possibilities.
1) Your power supply is fried
2) Your motherboard could have got static shocked and got fried.
So if it is still under warranty, better send it back and claim your warranty
You indicated that you built this system. A system that comes up then immediately shuts down could be either the MB or the PS. In my experience though it has been the PS that is bad when this happens. A bad PS will usually be shutdown by a working MB, but a bad MB might not shut down a working or bad PS once the PS starts, or perhaps not even allow the PS to start at all! Generally the PS is easier to obtain, swap out (and usually cheaper if you have to replace it) so I would start there. As mentioned above check on the warranty.